Electronic device

Abstract

This application provides an electronic device, including an antenna. The antenna includes a first radiator, a second radiator, and a metal connection member connected between the first radiator and the second radiator. The antenna generates a first resonance and a second resonance, and has good total efficiency and radiation efficiency at frequencies covered by the first resonance and the second resonance.

Description

[0001] This application claims priority to Chinese Patent Application No. 202410269916.0, filed with the China National Intellectual Property Administration on March 8, 2024 and entitled "ELECTRONIC DEVICE", which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] This application relates to the field of wireless communication, and in particular, to an electronic device.BACKGROUND

[0003] With an increasing requirement of people for high-speed data transmission, a development trend of an industrial design (industrial design, ID) of electronic devices is to have a large screen-to-body ratio and a plurality of cameras. Consequently, antenna clearance is greatly reduced, and layout space is increasingly limited.

[0004] In a current state, 3rd generation mobile communication technology (3rd generation wireless systems, 3G), 4th generation mobile communication technology (4th generation wireless systems, 4G), and 5th generation mobile communication technology (5th generation wireless systems, 5G) frequency bands are to coexist as communication frequency bands of the electronic devices for a long time, requiring an increasing quantity of antennas.

[0005] However, a conventional solution, for example, increased dimensions of a radiator of the antenna to expand an efficiency bandwidth of the antenna, has hit a bottleneck. Therefore, with the dimensions of the radiator unchanged, it is urgent to increase the efficiency bandwidth of the antenna.SUMMARY

[0006] This application provides an electronic device, including an antenna. The antenna includes a first radiator, a second radiator, and a metal connection member connected between the first radiator and the second radiator. The antenna generates a first resonance and a second resonance, and has good total efficiency and radiation efficiency at frequencies covered by the first resonance and the second resonance.

[0007] According to a first aspect, an electronic device is provided, including: a printed circuit board PCB and a rear cover, where the PCB and the rear cover are disposed opposite to each other; and an antenna, where the antenna includes a first radiator, a second radiator, and a first metal connection member, and the first radiator, the second radiator, and the first metal connection member are disposed between the PCB and the rear cover; the first radiator includes a first connection point, the second radiator includes a second connection point, a first end of the first metal connection member is coupled to the first connection point, and a second end of the first metal connection member is coupled to the second connection point; and a length L of the first metal connection member, a length L1 of the first radiator, and a length L2 of the second radiator satisfy: (L1+L2) / 16≤L≤(L1+L2) / 2.

[0008] According to this embodiment of this application, a short connection structure of the first metal connection member is used. When the antenna generates a resonance, currents or electric fields generated by the antenna are mainly concentrated in different radiators and surrounding regions thereof. The first radiator and a surrounding region of the first radiator and the second radiator and a surrounding region of the second radiator do not have a current or an electric field of approximately same strength at the same time. Therefore, a conductor loss and a dielectric loss of the antenna can be reduced when the antenna generates a resonance, thereby improving total efficiency and radiation efficiency of the antenna.

[0009] With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes a ground plane; a first end of the first radiator and a first end of the second radiator are opposite to each other and are not in contact with each other; the first end of the first radiator or the first metal member includes a first grounding point, the first radiator or the first metal member is coupled to the ground plane at the first grounding point, and a second end of the first radiator is an open end; and the first end of the second radiator is an open end, a second end of the second radiator includes a second grounding point, and the second radiator is coupled to the ground plane at the second grounding point.

[0010] With reference to the first aspect, in some implementations of the first aspect, the first metal member includes the first grounding point, and a length of the first metal member between the first connection point and the first grounding point is less than or equal to 5 mm.

[0011] With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes a ground plane; a first end of the first radiator and a first end of the second radiator are opposite to each other and are not in contact with each other; the first end of the first radiator or the first metal member includes a first grounding point, the first radiator or the first metal member is coupled to the ground plane at the first grounding point, and a second end of the first radiator is an open end; and the first end of the second radiator or the first metal member includes a second grounding point, a second end of the second radiator or the second end of the first metal member is an open end, and the second radiator is coupled to the ground plane at the second grounding point.

[0012] With reference to the first aspect, in some implementations of the first aspect, the first metal member includes the first grounding point, and a length of the first metal member between the first connection point and the first grounding point is less than or equal to 5 mm; and / or the first metal member includes the second grounding point, and a length of the first metal member between the second connection point and the second grounding point is less than or equal to 5 mm.

[0013] With reference to the first aspect, in some implementations of the first aspect, the first radiator and the second radiator are configured to generate a first resonance and a second resonance, and a frequency of the first resonance is lower than a frequency of the second resonance; at a first resonance point of the first resonance, a current on the first radiator and a current on the second radiator are reverse; and at a second resonance point of the second resonance, the current on the first radiator and the current on the second radiator are co-directional.

[0014] With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes a ground plane; a first end of the first radiator and a first end of the second radiator are opposite to each other and are not in contact with each other; the first end of the first radiator is an open end, a second end of the first radiator includes a first grounding point, and the first radiator is coupled to the ground plane at the first grounding point; and the first end of the second radiator is an open end, a second end of the second radiator includes a second grounding point, and the second radiator is coupled to the ground plane at the second grounding point.

[0015] With reference to the first aspect, in some implementations of the first aspect, the first radiator and the second radiator are configured to generate a first resonance and a second resonance, and a frequency of the first resonance is lower than a frequency of the second resonance; at a first resonance point of the first resonance, a current on the first radiator and a current on the second radiator are co-directional; and at a second resonance point of the second resonance, the current on the first radiator and the current on the second radiator are reverse.

[0016] According to this embodiment of this application, in each of the first radiator and the second radiator, one end is a grounding end, and the other end is an open end, to form a structure similar to an inverted F antenna (inverted F antenna, IFA) or a structure similar to a left-handed antenna. The left-handed antenna may be, for example, an antenna that conforms to a composite left and right hand (composite right and left hand, CRLH) transmission line structure.

[0017] In addition, both the grounding end of the first radiator and the grounding end of the second radiator may be disposed randomly, for example, disposed close to each other or disposed away from each other. This is not limited in this embodiment of this application.

[0018] With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes a feed circuit, the first radiator includes a feed point, and the feed circuit is coupled to the feed point.

[0019] According to this embodiment of this application, compared with a case in which the feed point is disposed on the first metal connection member, when the feed point is disposed on the first radiator, a conductor loss and a dielectric loss of the antenna are smaller when the antenna generates a resonance, so that total efficiency and radiation efficiency of the antenna can be better improved, and the antenna has a wider efficiency bandwidth.

[0020] With reference to the first aspect, in some implementations of the first aspect, a length D1 of the first radiator between the feed point and the first connection point is greater than or equal to 0.5 mm.

[0021] According to this embodiment of this application, the feed point and the first connection point are spaced apart, so that the antenna can have a better radiation characteristic.

[0022] With reference to the first aspect, in some implementations of the first aspect, the antenna further includes a first electronic element; and the first electronic element is connected between the first end of the first metal connection member and the first connection point in a coupling manner.

[0023] With reference to the first aspect, in some implementations of the first aspect, the antenna further includes a second electronic element; and the second electronic element is connected between the second end of the first metal connection member and the second connection point in a coupling manner.

[0024] According to this embodiment of this application, the first electronic element and / or the second electronic element may be configured to determine impedance between the first connection point of the first radiator and the first metal connection member and / or impedance between the second connection point of the second radiator and the first metal connection member, to match the first radiator and / or the second radiator. The first electronic element and / or the second electronic element may be configured to increase a degree of freedom for adjusting a radiation characteristic of the antenna.

[0025] In some implementations, the first electronic element may be inductive, for example, may be an inductor, or an element equivalent to an inductor.

[0026] In some implementations, the second electronic element may be capacitive, for example, may be a capacitor, or an element equivalent to a capacitor.

[0027] With reference to the first aspect, in some implementations of the first aspect, the length L1 of the first radiator and the length L2 of the second radiator satisfy: L2×90%≤L1≤L2×120%.

[0028] According to this embodiment of this application, the length L1 of the first radiator is approximately the same as the length L2 of the second radiator, so that symmetry of the antenna is improved, and the antenna can have a better radiation characteristic.

[0029] With reference to the first aspect, in some implementations of the first aspect, the antenna further includes a third radiator; and the first radiator is disposed between the third radiator and the second radiator, and the third radiator is configured to generate a third resonance.

[0030] According to this embodiment of this application, because the third radiator is disposed, the antenna may additionally generate the third resonance by the third radiator based on the first resonance and the second resonance. In some implementations, the third resonance may be understood as a parasitic resonance. In some implementations, the first resonance, the second resonance, and the third resonance are close to each other to jointly form one resonance, to expand an operating bandwidth of the antenna.

[0031] With reference to the first aspect, in some implementations of the first aspect, the first radiator and the second radiator are configured to generate a first resonance and a second resonance; and the first resonance, the second resonance, and the third resonance jointly form at least one operating frequency band of the antenna.

[0032] With reference to the first aspect, in some implementations of the first aspect, a second metal connection member and a third radiator of the antenna; the second radiator includes a third connection point, and the third radiator includes a fourth connection point; and a first end of the second metal connection member is coupled to the third connection point, and a second end of the second metal connection member is coupled to the fourth connection point.

[0033] With reference to the first aspect, in some implementations of the first aspect, the first radiator, the second radiator, and the third radiator are configured to generate a first resonance, a second resonance, and a third resonance; and the first resonance, the second resonance, and the third resonance jointly form at least one operating frequency band of the antenna.

[0034] According to this embodiment of this application, the first radiator, the second radiator, and the third radiator are configured to generate the first resonance, the second resonance, and the third resonance. The first resonance, the second resonance, and the third resonance may jointly form one resonance, to expand a bandwidth of the antenna.

[0035] With reference to the first aspect, in some implementations of the first aspect, the length L1 of the first radiator and a length L3 of the third radiator satisfy: L3×90%≤L1≤L3×120%.BRIEF DESCRIPTION OF DRAWINGS

[0036] FIG. 1 is a diagram of an electronic device 10 according to an embodiment of this application; FIG. 2 is a diagram of an antenna 200 according to an embodiment of this application; FIG. 3 is a diagram of an antenna 200 according to an embodiment of this application; FIG. 4 is a diagram of an antenna 200 according to an embodiment of this application; FIG. 5 is a diagram of an antenna 200 according to an embodiment of this application; FIG. 6 is a diagram of an electronic device 10 according to an embodiment of this application; FIG. 7 is a diagram of an electronic device 10 according to an embodiment of this application; FIG. 8 is a diagram of an electronic device 10 according to an embodiment of this application; FIG. 9 is a diagram of another antenna 200 according to an embodiment of this application; FIG. 10 shows a simulation result of an S parameter of the antenna 200 shown in FIG. 9; FIG. 11 shows simulation results of total efficiency and radiation efficiency of the antenna 200 shown in FIG. 10; FIG. 12 is a diagram of current distribution of the antenna 200 shown in FIG. 9 in an electronic device 10 at a resonance point of a first resonance; FIG. 13 is a diagram of current distribution of the antenna 200 shown in FIG. 9 in an electronic device 10 at a resonance point of a second resonance; FIG. 14 is a diagram of current distribution of the antenna 200 shown in FIG. 9 in an electronic device 10 at a resonance point of a third resonance; FIG. 15 is a diagram of an antenna 200 according to an embodiment of this application; FIG. 16 is a diagram of an antenna 200 according to an embodiment of this application; and FIG. 17 is a diagram of an antenna 200 according to an embodiment of this application. DESCRIPTION OF EMBODIMENTS

[0037] The following explains terms that may appear in embodiments of this application.

[0038] It should be understood that the term "and / or" in this specification describes only a same field for describing associated objects and indicates that three relationships may exist. For example, A and / or B may indicate the following three cases: Only A exists, both A and B exist, and only B exists. In addition, the character " / " in this specification usually indicates an "or" relationship between the associated objects.

[0039] In this application, "in a range of ..." is used, except when it is separately specified that no end value is included, end values at both ends of the range are included by default. For example, in a range from 1 to 5, two values 1 and 5 are included.

[0040] Coupling: The coupling may be understood as direct coupling and / or indirect coupling, and a "coupling connection" may be understood as a direct coupling connection and / or an indirect coupling connection. The direct coupling may also be referred to as an "electrical connection", which may be understood as physical contact and electrical conduction of components, or may be understood as a form of connection between different components in a line structure through a physical line that can transmit an electrical signal, for example, a printed circuit board (printed circuit board, PCB) copper foil or a conducting wire. The "indirect coupling" may be understood as electrical conduction of two conductors in a spaced / non-contact manner. In some implementations, the indirect coupling may also be referred to as capacitive coupling. For example, signal transmission is implemented by forming an equivalent capacitor through coupling in a gap between two spaced conductive members.

[0041] Element / Component: The element / component includes at least one of a lumped element / component, and a distributed element / component.

[0042] Lumped element / component: The lumped element / component is a general name of all elements whose dimensions are far less than a wavelength corresponding to an operating frequency of a circuit. For a signal, a characteristic of the element is constant at any time, regardless of a frequency.

[0043] Distributed element / component: A difference between the distributed element and a lumped element lies in that if dimensions of an element are close to or greater than a wavelength corresponding to an operating frequency of a circuit, a characteristic of each point of the element varies with a signal when the signal passes through the element. In this case, the element cannot be considered as a single entity with a constant characteristic, but needs to be referred to as a distributed element.

[0044] Capacitor: The capacitor may be understood as a lumped capacitor and / or a distributed capacitor. The lumped capacitor is a capacitive component, for example, a capacitive element. The distributed capacitor (or a distributed type capacitor) is an equivalent capacitor formed by two conductive members that are spaced apart by a specific gap.

[0045] Inductor: The inductor may be understood as a lumped inductor and / or a distributed inductor. The lumped inductor is an inductive component, for example, an inductive element. The distributed inductor (or distributed type inductor) is an equivalent inductor formed by a conductive member with a specific length.

[0046] Radiator: The radiator is an apparatus configured to receive / send electromagnetic wave radiation in an antenna. In some cases, an "antenna" is understood as a radiator in a narrow sense. The antenna converts guided wave energy from a transmitter into a radio wave, or converts a radio wave into guided wave energy to radiate and receive a radio wave. Modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to a transmit radiator through a feeder. The radiator converts the energy into specific polarized electromagnetic wave energy and radiates the energy in a required direction. A receive radiator converts specific polarized electromagnetic wave energy from a specific direction of space into modulated high-frequency current energy, and transmits the modulated high-frequency current energy to an input end of a receiver through a feeder.

[0047] The radiator may include a conductor with a specific shape and dimensions, for example, a linear radiator or a sheet-shaped radiator. A specific shape is not limited in this application. In some implementations, the linear radiator may be briefly referred to as a wire antenna. In some implementations, the linear radiator may be implemented by a conductive side frame, and may also be referred to as a side frame antenna. In some implementations, the linear radiator may be implemented by a bracketed conductor, and may also be referred to as a bracketed antenna. In some implementations, a wire diameter (for example, including a thickness and a width) of the linear radiator or a radiator of the wire antenna is far less than a wavelength (for example, a dielectric wavelength) (for example, is less than 1 / 16 of the wavelength), and a length may be compared with the wavelength (for example, the dielectric wavelength) (for example, the length is approximately 1 / 8 of the wavelength, or 1 / 8 to 1 / 4 of the wavelength, or 1 / 4 to 1 / 2 of the wavelength, or greater). Main forms of the wire antenna include the following: a dipole antenna, a half-wave dipole antenna, a monopole antenna, a loop antenna, and an inverted F antenna (also referred to as an IFA, Inverted F Antenna). For example, for the dipole antenna, each dipole antenna usually includes two radiation stubs, and each stub is fed by a feed portion from a feed end of the radiation stub. For example, the inverted F antenna (Inverted F Antenna, IFA) may be considered as being obtained by adding a grounding path to a monopole antenna. The IFA has a feed point and a grounding point, and is referred to as the inverted F antenna because a side view of the IFA is in an inverted F shape. In some implementations, the sheet-shaped radiator may include a microstrip antenna or a patch (patch) antenna, for example, a planar inverted F antenna (also referred to as a PIFA, Planar Inverted F Antenna). In some implementations, the sheet-shaped radiator may be implemented by a planar conductor (for example, a conductive sheet or a conductive coating). In some implementations, the sheet-shaped radiator may include a conductive sheet, for example, a copper sheet. In some implementations, the sheet-shaped radiator may include a conductive coating, for example, silver paste. A shape of the sheet-shaped radiator includes a circular shape, a rectangular shape, a ring shape, and the like. A specific shape is not limited in this application. A structure of the microstrip antenna usually includes a dielectric substrate, a radiator, and a ground plane, where the dielectric substrate is disposed between the radiator and the ground plane.

[0048] The radiator may also include a slot or a slit formed on a conductor, for example, a closed or semi-closed slot or slit formed on a grounded conductor surface. In some implementations, a radiator with a slot or a slit may be briefly referred to as a slot antenna or a slotted antenna. In some implementations, a radial size (for example, including a width) of the slot or the slit of the slot antenna / the slotted antenna is far less than a wavelength (for example, a dielectric wavelength) (for example, is less than 1 / 16 of the wavelength), and a length size may be compared with the wavelength (for example, the dielectric wavelength) (for example, the length is approximately 1 / 8 of the wavelength, or 1 / 8 to 1 / 4 of the wavelength, or 1 / 4 to 1 / 2 of the wavelength, or greater). In some implementations, a radiator with a closed slot or slit may be briefly referred to as a closed slot antenna. In some implementations, a radiator with a semi-closed slot or slit (for example, an opening is additionally provided on the closed slot or slit) may be briefly referred to as an open slot antenna. In some embodiments, the slit is long strip-shaped. In some embodiments, a length of the slit is approximately half the wavelength (for example, the dielectric wavelength). In some embodiments, a length of the slit is approximately an integer multiple of the wavelength (for example, one dielectric wavelength). In some embodiments, the slit may be used for feeding through a transmission line bridged on one side or two sides of the slit. In this way, a radio frequency electromagnetic field is excited on the slit, and an electromagnetic wave is radiated to the space. In some implementations, a radiator of the slot antenna or the slotted antenna may be implemented by a conductive side frame that is grounded at two ends, and may also be referred to as a side frame antenna. In this embodiment, it may be considered that the slot antenna or the slotted antenna includes a linear radiator, and the linear radiator is spaced apart from the ground plane and is grounded at two ends of the radiator, to form a closed or semi-closed slot or slit. In some implementations, the radiator of the slot antenna or the slotted antenna may be implemented by a bracketed conductor that is grounded at two ends, and may also be referred to as a bracketed antenna.

[0049] A feed circuit is a combination of all circuits for receiving and transmitting radio frequency signals. The feed circuit may include a transceiver (transceiver) and a radio frequency front end (RF front end) circuit. In some cases, the "feed circuit" is understood in a narrow sense as a radio frequency integrated circuit (RFIC, Radio Frequency Integrated Circuit), and the RFIC may be considered to include a radio frequency front end chip and a transceiver. The feed circuit has a function of converting a radio wave (for example, a radio frequency signal) and an electrical signal (for example, a digital signal). Usually, the feed circuit is considered as a part of radio frequency.

[0050] In some embodiments, an electronic device may further include a test base (which is also referred to as a radio frequency base or a radio frequency test base). The test base may be configured to insert a coaxial cable, to test a characteristic of the radio frequency front end circuit or the radiator of the antenna through the cable. The radio frequency front end circuit may be considered as a circuit part coupled between the test base and the transceiver.

[0051] In some embodiments, the radio frequency front end circuit may be integrated into the radio frequency front end chip in the electronic device, or the radio frequency front end circuit and the transceiver may be integrated into the radio frequency integrated circuit in the electronic device.

[0052] It should be understood that any two of a first feed circuit, a second feed circuit, ..., and an N th< feed circuit in this application may share a same transceiver, for example, perform signal transmission through a radio frequency channel (for example, a port (pin) of the radio frequency integrated circuit) in the transceiver; and may further share a radio frequency front end, for example, process a signal through a tuning circuit or an amplifier in a radio frequency front end.

[0053] It should be further understood that two of the first feed circuit, the second feed circuit, ..., and the N th< feed circuit in this application usually correspond to two radio frequency test bases in the electronic device.

[0054] A matching circuit is a circuit for adjusting a radiation characteristic of the antenna. In some implementations, the matching circuit is coupled between the feed circuit and a corresponding radiator. In some implementations, the matching circuit is coupled between the test base and the radiator. Usually, the matching circuit is a combination of circuits coupled between the radiator and the ground plane. In some implementations, the matching circuit may include a tuning circuit and / or an electronic element. The tuning circuit may be configured to switch between electronic elements connected to the radiator in a coupling manner. The matching circuit has a function of impedance matching and / or frequency tuning. Usually, the matching circuit is considered as a part of the antenna.

[0055] Grounding structure / feed structure: The grounding structure / feed structure may include a connection member, for example, a metal spring. The radiator is connected to the ground plane in a coupling manner through the grounding structure / connected to the feed circuit in a coupling manner through the feed structure. In some embodiments, the feed structure may include a transmission line / feeder, and the grounding structure may include a grounding line.

[0056] End / point: The "end / point" in a first end / second end / feed end / grounding end / feed point / grounding point / connection point of an antenna radiator cannot be understood in a narrow sense as an endpoint or an end portion that is physically disconnected from another radiator, and may also be considered as a point or a segment on a continuous radiator. In some implementations, the "end / point" may include a connection / coupling region that is on the antenna radiator and that is connected to another conductive structure in a coupling manner. For example, the feed end / feed point may be a connection / coupling region (for example, a region opposite to a part of the feed circuit) that is on the antenna radiator and that is connected to a feed structure or the feed circuit in a coupling manner. For another example, the grounding end / grounding point may be a connection / coupling region (for example, a region opposite to a part of a grounding circuit) that is on the antenna radiator and that is connected to a grounding structure or the grounding circuit in a coupling manner.

[0057] Open end and closed end: In some embodiments, the open end and the closed end are, for example, defined based on whether the end is grounded. The closed end is grounded, and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, defined relative to another conductor. The closed end is electrically connected to the another conductor, and the open end is not electrically connected to the another conductor. In some implementations, the open end may also be referred to as a floating end, a free end, an opening end, or an open-circuit end. In some implementations, the closed end may also be referred to as a grounding end or a short-circuit end. It should be understood that, in some embodiments, another conductor may be connected in a coupling manner through the open end, to transfer coupling energy (which may be understood as transferring a current).

[0058] In some embodiments, the "closed end" may also be understood from a perspective of current distribution. The closed end, the grounding end, or the like may be understood as a current strong point on the radiator, or may be understood as an electric field weak point on the radiator. In some implementations, the closed end is coupled to an electronic component (for example, a capacitor or an inductor), so that a current distribution characteristic of the current strong point / the electric field weak point of the radiator may not be changed. In some implementations, a slit (for example, a slit filled with an insulation material) is provided at or near the closed end, so that a current distribution characteristic of the current strong point / the electric field weak point of the radiator may not be changed.

[0059] In some embodiments, the "open end" may also be understood from a perspective of current distribution. The open end, the floating end, or the like may be understood as a current weak point on the radiator, or may be understood as an electric field strong point on the radiator. In some implementations, the open end is coupled to an electronic component (for example, a capacitor or an inductor), so that a current distribution characteristic of the current weak point / the electric field strong point of the radiator may not be changed.

[0060] It should be understood that a radiator end (similar to a radiator at an opening of the open end or the floating end from a perspective of a radiator structure) in a slit is coupled to an electronic component (for example, a capacitor or an inductor), so that the radiator end is a current strong point / electric field weak point. In this case, it should be understood that the radiator end in the slit is actually a closed end, a grounding end, or the like.

[0061] A "floating radiator" in embodiments of this application means that the radiator is not directly connected to a feeder / feed stub and / or a grounding line / grounding stub, but is fed and / or grounded in an indirect coupling manner.

[0062] It should be understood that "floating" in the "floating end" and the "floating radiator" does not mean that there is no structure around the radiator to support the radiator. In some implementations, the floating radiator may be, for example, a radiator disposed on an inner surface of an insulation rear cover.

[0063] That currents are co-directional / reverse in embodiments of this application should be understood as that directions of main currents on conductors on a same side are the same or reverse. For example, when co-directionally distributed currents are excited on a bent conductor or an annular conductor (for example, a current path is also bent or annular), it should be understood that although main currents excited on conductors on two sides of the annular conductor (for example, on conductors around a slit, or on conductors on two sides of a slit) are in reverse directions, the main currents still meet a definition of co-directionally distributed currents in embodiments of this application. In some implementations, that currents on a conductor are co-directional may mean that the currents on the conductor have no reverse point. In some implementations, that currents on a conductor are reverse may mean that the currents on the conductor have at least one reverse point. In some implementations, that currents on two conductors are co-directional may mean that none of the currents on the two conductors has a reverse point and the currents flow in a same direction. In some implementations, that currents on two conductors are reverse may mean that none of the currents on the two conductors has a reverse point and the currents flow in reverse directions. That currents on a plurality of conductors are co-directional / reverse may be correspondingly understood.

[0064] Resonance / resonance frequency: The resonance frequency is also referred to as a resonant frequency. The resonance frequency may have a frequency range, namely, a frequency range in which resonance occurs. A frequency corresponding to a strongest resonance point is a center frequency point frequency. A return loss characteristic of the center frequency may be less than -20 dB. It should be understood that, unless otherwise specified, in generating a "first / second / ... resonance" by the antenna / the radiator mentioned in this application, the first resonance should be a fundamental mode resonance generated by the antenna / the radiator, or a resonance with a lowest frequency generated by the antenna / the radiator. It should be understood that the antenna / the radiator may generate one or more antenna modes based on a specific design, and one fundamental mode resonance may be correspondingly generated in each antenna mode.

[0065] Resonance frequency band: A range of a resonance frequency is the resonance frequency band, and a return loss characteristic of any frequency on the resonance frequency band may be less than -6 dB or -5 dB.

[0066] Communication frequency band / Operating frequency band: Regardless of a type of antenna, the antenna always operates in a specific frequency range (a frequency band width). For example, an operating frequency band of an antenna supporting a B40 frequency band includes a frequency in a range of 2300 MHz to 2400 MHz. In other words, the operating frequency band of the antenna includes the B40 frequency band. A frequency range that meets a requirement of an indicator may be considered as an operating frequency band of an antenna.

[0067] A resonance frequency band and an operating frequency band may be the same, or may partially overlap each other. In some implementations, one or more resonance frequency bands of the antenna may cover one or more operating frequency bands of the antenna.

[0068] Electrical length: The electrical length may be a ratio of a physical length (namely, a mechanical length or a geometric length) to a wavelength of a transmitted electromagnetic wave, and the electrical length may satisfy the following formula: L ¯ = L λ

[0069] Herein, L is the physical length, and λ is the wavelength of the electromagnetic wave.

[0070] Wavelength: The wavelength or an operating wavelength may be a wavelength corresponding to a center frequency of a resonance frequency or a center frequency of an operating frequency band supported by an antenna. For example, it is assumed that a center frequency of a B1 uplink frequency band (with a resonance frequency ranging from 1920 MHz to 1980 MHz) is 1955 MHz. In this case, an operating wavelength may be a wavelength calculated by using the frequency of 1955 MHz. The "operating wavelength" is not limited to the center frequency, and may alternatively be a wavelength corresponding to a non-center frequency of the resonance frequency or the operating frequency band.

[0071] It should be understood that a wavelength of a radiation signal in the air may be calculated as follows: (Air wavelength or vacuum wavelength)=Speed of light / Frequency, where the frequency is a frequency (MHz) of the radiation signal, and the speed of light may be 3×10 8< m / s. A wavelength of the radiation signal in a medium may be calculated as follows: Dielectric wavelength = Speed of light / ε / Frequency , where ε is a relative dielectric constant of the medium. The wavelength in embodiments of this application is usually a dielectric wavelength, and may be a dielectric wavelength corresponding to a center frequency of a resonance frequency, or a dielectric wavelength corresponding to a center frequency of an operating frequency band supported by an antenna. For example, it is assumed that a center frequency of a B1 uplink frequency band (with a resonance frequency ranging from 1920 MHz to 1980 MHz) is 1955 MHz. In this case, a wavelength may be a dielectric wavelength calculated by using the frequency of 1955 MHz. The "dielectric wavelength" is not limited to the center frequency, and may alternatively be a dielectric wavelength corresponding to a non-center frequency of the resonance frequency or the operating frequency band. For ease of understanding, the dielectric wavelength mentioned in embodiments of this application may be simply calculated by using a relative dielectric constant of a medium filled in one or more sides of a radiator.

[0072] Total efficiency (total efficiency) of an antenna: The total efficiency of the antenna is a ratio of input power to output power at an antenna port.

[0073] Radiation efficiency (radiation efficiency) of an antenna: The radiation efficiency of the antenna is a ratio of power radiated by the antenna to the space (namely, power that is effectively converted into an electromagnetic wave) to active power input to the antenna. Active power input to the antenna=Input power of the antenna-Loss power. The loss power mainly includes return loss power and metal ohmic loss power and / or dielectric loss power. The radiation efficiency is a value for measuring a radiation capability of an antenna. Both a metal loss and a dielectric loss are factors that affect the radiation efficiency.

[0074] A person skilled in the art may understand that efficiency is usually indicated by a percentage, and there is a corresponding conversion relationship between the efficiency and dB. Efficiency closer to 0 dB indicates better efficiency of the antenna.

[0075] Antenna return loss: The antenna return loss may be understood as a ratio of power of a signal reflected back to an antenna port through an antenna circuit to transmit power of the antenna port. A smaller reflected signal indicates a larger signal radiated by an antenna to the space and higher radiation efficiency of the antenna. A larger reflected signal indicates a smaller signal radiated by the antenna to the space and lower radiation efficiency of the antenna.

[0076] The antenna return loss may be indicated by an S11 parameter, and S11 is one of S parameters. S11 indicates a reflection coefficient, and the parameter can indicate transmit efficiency of the antenna. The S11 parameter is usually a negative number. A smaller S11 parameter indicates a smaller antenna return loss, less energy reflected back by the antenna, namely, more energy that actually enters the antenna, and higher total efficiency of the antenna. A larger S11 parameter indicates a larger antenna return loss and lower total efficiency of the antenna.

[0077] It should be noted that, an S11 value of -6 dB is usually used as a standard in engineering. When an S11 value of the antenna is less than -6 dB, it may be considered that the antenna can operate normally, or it may be considered that transmit efficiency of the antenna is high.

[0078] Specific absorption rate (specific absorption rate, SAR): The specific absorption rate is an expression unit that measures how much radio frequency radiation energy is actually absorbed by a body, is referred to as a specific absorption ratio, and is expressed in watt per kilogram (W / kg) or milliwatt per gram (mW / g). The SAR is accurately defined as a derivative, relative to time, of unit energy (dw) absorbed by unit mass (dm) in a unit volume (dv) of a given mass density (ρ-density of human tissues).

[0079] Currently, there are two international standards: the European standard of 2 w / kg and the American standard of 1.6 w / kg. A specific meaning of the European standard means that electromagnetic radiation energy absorbed by each kilogram of human tissues cannot not exceed 2 watts in 6 minutes.

[0080] Ground (ground plane) (ground, GND): The ground (the ground plane) may generally be at least a part of any grounding plane, grounding plate, grounding metal layer, or the like in an electronic device (for example, a mobile phone), or at least a part of any combination of any grounding plane, grounding plate, grounding component, or the like. The "ground" may be configured to ground a component in the electronic device. In an embodiment, the "ground" may be a grounding plane of a circuit board of the electronic device, or may be a grounding plate formed by a middle frame of the electronic device or a grounding metal layer formed by a metal film below a screen of the electronic device. In an embodiment, the circuit board may be a printed circuit board (printed circuit board, PCB), for example, an 8-layer, 10-layer, or 12-layer to 14-layer board with 8, 10, 12, 13, or 14 layers of conductive materials, or an element that is separated and electrically insulated by a dielectric layer or an insulation layer, for example, a glass fiber or a polymer. In an embodiment, the circuit board includes a dielectric substrate, a grounding plane, and a trace layer. The trace layer and the grounding plane are electrically connected through a via. In an embodiment, components such as a display, a touchscreen, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, and a system on chip (system on chip, SoC) structure may be mounted on or connected to the circuit board, or electrically connected to the trace layer and / or the grounding plane in the circuit board. For example, a radio frequency source is disposed on the trace layer.

[0081] Any of the foregoing grounding plane, or grounding plate, or grounding metal layer is made of a conductive material. In an embodiment, the conductive material may be any one of the following materials: copper, aluminum, stainless steel, brass and an alloy thereof, copper foil on an insulation substrate, aluminum foil on an insulation substrate, gold foil on an insulation substrate, silver-plated copper, silver-plated copper foil on an insulation substrate, silver foil on an insulation substrate, tin-plated copper, cloth impregnated with graphite powder, a graphite-coated substrate, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. A person skilled in the art may understand that the grounding plane / grounding plate / grounding metal layer may alternatively be made of another conductive material.

[0082] Grounding: The grounding means coupling with the ground / ground plane in any manner. In some implementations, the grounding may be grounding through an entity, for example, grounding through an entity (or referred to as entity grounding) at a specific position on a side frame is implemented through some mechanical parts of a middle frame. In some implementations, the grounding may be grounding through a component, for example, grounding through components (or referred to as component grounding) such as capacitors / inductors / resistors connected in series or in parallel.

[0083] The following describes technical solutions of embodiments in this application with reference to accompanying drawings.

[0084] As shown in FIG. 1, an electronic device 10 may include a cover (cover) 13, a display / display module (display) 15, a printed circuit board (printed circuit board, PCB) 17, a middle frame (middle frame) 19, and a rear cover (rear cover) 21. It should be understood that, in some embodiments, the cover 13 may be cover glass (cover glass), or may be replaced with a cover made of another material, for example, a cover made of a polyethylene terephthalate (Polyethylene terephthalate, PET) material.

[0085] The cover 13 may be tightly attached to the display module 15, and may be mainly configured to protect the display module 15 and prevent the display module 15 from dust.

[0086] In some implementations, the display module 15 may include a liquid crystal display (liquid crystal display, LCD) panel, a light-emitting diode (light-emitting diode, LED) display panel, an organic light-emitting semiconductor (organic light-emitting diode, OLED) display panel, or the like. This is not limited in embodiments of this application.

[0087] The middle frame 19 is mainly used to support the entire electronic device. FIG. 1 shows that the PCB 17 is disposed between the middle frame 19 and the rear cover 21. It should be understood that, in some implementations, the PCB 17 may alternatively be disposed between the middle frame 19 and the display module 15. This is not limited in embodiments of this application. The PCB 17 may be a flame-resistant material (FR-4) dielectric board, or may be a Rogers (Rogers) dielectric board, or may be a hybrid dielectric board of Rogers and FR-4, or the like. Herein, FR-4 is a grade designation of a flame-resistant material, and the Rogers dielectric board is a high-frequency board. An electronic element, for example, a radio frequency integrated circuit, is carried on the PCB 17. In some implementations, a metal layer may be disposed on the PCB 17. The metal layer may be configured to ground the electronic element carried on the PCB 17, or may be configured to ground another element, for example, a bracketed antenna or a side frame antenna. The metal layer may be referred to as a ground plane, a grounding plate, or a grounding plane. In some implementations, the metal layer may be formed by etching a metal on a surface of any dielectric board in the PCB 17. In some implementations, the metal layer used for grounding may be disposed on a side that is of the PCB 17 and that is close to the middle frame 19. In some implementations, an edge of the PCB 17 may be considered as an edge of a grounding plane of the PCB 17. In some implementations, the metal middle frame 19 may also be configured to ground the foregoing element. The electronic device 10 may further have another ground plane / grounding plate / grounding plane. As described above, details are not described herein again.

[0088] Due to internal compactness of the electronic device, a ground plane / grounding plate / grounding plane (for example, a printed circuit board, a middle frame, a screen metal layer, and a battery may all be considered as a part of the ground plane) is usually disposed in internal space 0 mm to 2 mm away from an inner surface of the side frame. In some implementations, a medium is filled between the side frame and the ground plane. A length and a width of a rectangle enclosed by an inner surface contour of the filled medium may be simply considered as a length and a width of the ground plane. Alternatively, a length and a width of a rectangle enclosed by a contour formed by superposing all conductive parts inside the side frame may be considered as a length and a width of the ground plane.

[0089] The electronic device 10 may further include a battery (not shown in the figure). The battery may be disposed between the middle frame 19 and the rear cover 21, or may be disposed between the middle frame 19 and the display module 15. This is not limited in embodiments of this application. In some embodiments, the PCB 17 is divided into a mainboard and a sub-board. The battery may be disposed between the mainboard and the sub-board. The mainboard may be disposed between the middle frame 19 and an upper edge of the battery, and the sub-board may be disposed between the middle frame 19 and a lower edge of the battery.

[0090] The electronic device 10 may further include a side frame 11. The side frame 11 may be made of a conductive material, for example, a metal. The side frame 11 may be disposed between the display module 15 and the rear cover 21, and circumferentially extends around a periphery of the electronic device 10. The side frame 11 may have four sides surrounding the display module 15, to help fasten the display module 15.

[0091] In an implementation, the side frame 11 mainly made of the conductive material may be referred to as a conductive side frame or a metal side frame of the electronic device 10, and is applicable to an industrial design (industrial design, ID) of a metal appearance. In an implementation, an outer surface of the side frame 11 is mainly made of a conductive material, for example, a metal material, to form an appearance of a metal side frame. In these implementations, a conductive part that includes the outer surface and that is in the side frame 11 may be used as an antenna radiator of the electronic device 10, and is usually referred to as a side frame antenna.

[0092] In another implementation, an outer surface of the side frame 11 is mainly made of a non-conductive material, for example, plastic, to form an appearance of a non-metal side frame, and this is applicable to a non-metal ID. In an implementation, an inner surface of the side frame 11 may be made of a conductive material, for example, a metal material. In this implementation, a conductive part of the inner surface of the side frame 11 may be used as an antenna radiator of the electronic device 10. It should be understood that the radiator (or the conductive material of the inner surface) disposed on the inner surface of the side frame 11 may be disposed close to the non-conductive material of the side frame 11, to minimize a volume occupied by the radiator, and be closer to the outside of the electronic device 10, so as to achieve better signal transmission effect. The radiator may also be referred to as a side frame antenna. It should be noted that, that the antenna radiator is disposed close to the non-conductive material of the side frame 11 means that the antenna radiator may be tightly attached to an inner surface of the non-conductive material, or may be embedded inside the non-conductive material, or may be disposed close to an inner surface of the non-conductive material. For example, there can be a specific small slit between the antenna radiator and the inner surface of the non-conductive material. It should be understood that the conductive material and the non-conductive material each may be considered as a part of the side frame 11.

[0093] It should be understood that an insulation slit may be provided on the side frame 11, and a conductor part of the side frame between two insulation slits or between the insulation slit and a grounding point is used as a radiator, to form a side frame antenna. When the side frame 11 is formed by a conductive material, for example, a metal, the insulation slit may be understood as that a slit provided on the side frame 11 is filled with a non-metal material (insulation material). In this case, the slit is visible on an appearance surface. When the outer surface of the side frame 11 is made of a non-conductive material, the insulation slit may be understood as a slit formed between two radiators on the inner surface of the side frame 11. A non-metal material (insulation material) may be disposed in the slit. Alternatively, no non-metal material may be disposed in the slit, for example, the slit may be filled with air. In this case, the slit is invisible on an appearance surface.

[0094] The middle frame 19 may include the side frame 11, and the middle frame 19 including the side frame 11 is used as an integrated part, and may support an electronic component in the entire device. The cover 13 and the rear cover 21 are respectively closed along an upper edge and a lower edge of the side frame, to form a casing or a housing (housing) of the electronic device. In some implementations, the cover 13, the rear cover 21, the side frame 11, and / or the middle frame 19 may be collectively referred to as a casing or a housing of the electronic device 10. It should be understood that the "casing or housing" may mean a part or all of any one of the cover 13, the rear cover 21, the side frame 11, and the middle frame 19, or mean a part or all of any combination of the cover 13, the rear cover 21, the side frame 11, and the middle frame 19.

[0095] At least a part of the side frame 11 may be used as an antenna radiator to transmit / receive a radio frequency signal. A gap may exist between the part of the side frame that is used as the radiator and another part of the middle frame 19, to ensure that the antenna radiator has a good radiation environment. In some implementations, the middle frame 19 may be provided with an aperture at the part of the side frame that is used as the radiator, to facilitate radiation of an antenna.

[0096] Alternatively, the side frame 11 may not be considered as a part of the middle frame 19. In some implementations, the side frame 11 and the middle frame 19 may be connected and integrally formed. In another embodiment, the side frame 11 may include a protrusion member extending inward, to be connected to the middle frame 19, for example, connected through a spring or a screw, or connected through welding. The protrusion member of the side frame 11 may be further configured to receive a feed signal, so that at least a part of the side frame 11 is used as an antenna radiator to receive / transmit a radio frequency signal. A gap may exist between the middle frame 19 and the part of the side frame that is used as the radiator, to ensure that the antenna radiator has a good radiation environment, and the antenna has a good signal transmission function.

[0097] The rear cover 21 may be a rear cover made of a metal material, or may be a rear cover made of a non-conductive material, for example, may be a non-metal rear cover such as a glass rear cover and a plastic rear cover, or may be a rear cover made of both a conductive material and a non-conductive material. In some implementations, the rear cover 21 including the conductive material may replace the middle frame 19, and is used as an integrated part with the side frame 11, to support an electronic component in the entire device.

[0098] In some implementations, the middle frame 19 and / or a conductive part of the rear cover 21 may be used as a reference ground of the electronic device 10. The side frame 11, the PCB 17, and the like of the electronic device may be electrically connected to the middle frame for grounding.

[0099] The antenna of the electronic device 10 may be further disposed in the casing, for example, a bracketed antenna or a millimeter wave antenna (not shown in FIG. 1). Clearance of the antenna disposed in the housing may be obtained through a slit / hole in any one of the middle frame, and / or the side frame, and / or the rear cover, and / or the display, or through a non-conductive slit / aperture formed between any several of the middle frame, and / or the side frame, and / or the rear cover, and / or the display. The clearance of the antenna may be provided, to ensure a radiation characteristic of the antenna. It should be understood that, the clearance of the antenna may be a non-conductive region formed by any conductive component in the electronic device 10, and the antenna radiates a signal to external space through the non-conductive region. In some implementations, the antenna may be an antenna form based on a flexible mainboard (flexible printed circuit, FPC), an antenna form based on laser-direct-structuring (laser-direct-structuring, LDS), or an antenna form such as a microstrip antenna (microstrip disk antenna, MDA). In some implementations, the antenna may alternatively use a transparent structure embedded into the screen of the electronic device 10, so that the antenna is a transparent antenna element embedded into the screen of the electronic device 10.

[0100] FIG. 1 shows only an example of some components included in the electronic device 10. Actual shapes, actual dimensions, and actual structures of these components are not limited to those in FIG. 1.

[0101] It should be understood that, in embodiments of this application, it may be considered that a surface on which the display of the electronic device is located is a front surface, a surface on which the rear cover is located is a rear surface, and a surface on which the side frame is located is a side surface.

[0102] In a current state, 3G, 4G, and 5G frequency bands are to coexist as communication frequency bands of electronic devices for a long time, requiring an increasing quantity of antennas. However, a conventional solution, for example, increased dimensions of a radiator of the antenna to expand an efficiency bandwidth of the antenna, has hit a bottleneck. Therefore, with the dimensions of the radiator unchanged, it is urgent to increase the efficiency bandwidth of the antenna.

[0103] Embodiments of this application provide an electronic device, including an antenna. The antenna includes a first radiator, a second radiator, and a metal connection member connected between the first radiator and the second radiator. The antenna generates a first resonance and a second resonance, and has good total efficiency and radiation efficiency at frequencies covered by the first resonance and the second resonance.

[0104] FIG. 2 is a diagram of an antenna 200 according to an embodiment of this application. The electronic device 10 shown in FIG. 1 may include the antenna 200 shown in FIG. 2.

[0105] As shown in FIG. 2, the antenna 200 includes a first radiator 210, a second radiator 220, and a first metal connection member 230.

[0106] The first radiator 210 includes a first connection point 211, and the second radiator 220 includes a second connection point 212. A first end of the first metal connection member 230 is connected to the first connection point 211 in a coupling manner, and a second end of the first metal connection member 230 is connected to the second connection point 212 in a coupling manner.

[0107] In some implementations, the first end of the first metal connection member 230 may be understood as an end that is of a plurality of ends of the first metal connection member 230 and that is closer to the first radiator 210, and the second end of the first metal connection member 230 may be understood as an end that is of the plurality of ends of the first metal connection member 230 and that is closer to the second radiator 220. In some implementations, the first connection point 211 may be located on a side that is of the first radiator 210 and that is close to the second radiator 220, and the second connection point 212 may be located on a side that is of the second radiator 220 and that is close to the first radiator 210, so that the first metal connection member 230 is short.

[0108] It should be understood that, in embodiments of this application, the coupling connection may be implemented through direct coupling or indirect coupling. For brevity of description, direct coupling (an electrical connection) is used as an example for description. During actual application, adjustment may be performed based on different layout manners. This is not limited in embodiments of this application.

[0109] In this embodiment of this application, a length L of the first metal connection member 230, a length L1 of the first radiator 210, and a length L2 of the second radiator 220 may satisfy: (L1+L2) / 16≤L≤(L1+L2) / 2.

[0110] It should be understood that this is not limited in this embodiment of this application, and may be determined based on actual production or design. The length of the first metal connection member 230 may be understood as a total length of a metal connection member with one structure or metal connection members with more different structures combinations. It should be understood that, in some implementations, when the first metal connection member 230 is mainly made of one material, a length of the main material may also be used as a total length of the first metal connection member, for example, a total length of a metal member on an antenna bracket. It should also be understood that, when a plurality of structures of different materials are sequentially connected as metal connection members, it may alternatively be understood that a total length of the plurality of metal connection members is used as a total length of the first metal connection member. For example, when a length of one material is greater than 1 mm, the length can be included in calculation of the total length. In some implementations, when the first metal connection member 230 and the radiators are integrally formed, a total length of the first metal connection member 230 may be understood as a total length of the first metal connection member 230 that is bent and extended between two connection points of the radiators.

[0111] It should be further understood that, in some implementations, a maximum cross-sectional area of the first metal connection member 230 should be less than a cross-sectional area of the radiator. For example, the cross-sectional area of the first metal connection member 230 is less than or equal to 60% of the cross-sectional area of the radiator.

[0112] In some implementations, the first metal connection member 230 may be a combination of one or more of the following: a radio frequency transmission line, for example, a cable (cable), a microstrip (microstrip), or a coaxial line (coaxial line); a metal trace on a dielectric board (for example, a PCB of the electronic device); a metal trace on a flexible printed circuit FPC; a metal member (for example, may include a metal wire and / or a metal sheet) on an antenna bracket (for example, based on laser-direct-structuring LDS); a metal member disposed on another insulation member, for example, an insulation rear cover (which may include insulation materials such as glass and ceramic) of the electronic device; and another conductive connection member, for example, an elastic sheet, a spring plate, and conductive foam.

[0113] According to this embodiment of this application, a short connection structure of the first metal connection member 230 is used. When the antenna 200 generates a resonance, currents or electric fields generated by the antenna 200 are mainly concentrated in different radiators and surrounding regions thereof. The first radiator 210 and a surrounding region of the first radiator 210 and the second radiator 220 and a surrounding region of the second radiator 220 do not have a current or an electric field of approximately same strength at the same time. Therefore, a conductor loss and a dielectric loss of the antenna can be reduced when the antenna generates a resonance, thereby improving total efficiency and radiation efficiency of the antenna.

[0114] In addition, because the length of the first metal connection member 230 in the antenna 200 is short, layout of the first radiator 210, the second radiator 220, and the first metal connection member 230 is compact, and does not need to occupy large space, so that it is convenient for layout in an electronic device with increasingly limited space.

[0115] In some implementations, the length L of the first metal connection member 230, the length L1 of the first radiator 210, and the length L2 of the second radiator 220 may satisfy: L≤(L1+L2) / 4.

[0116] In some implementations, the length L of the first metal connection member 230, the length L1 of the first radiator 210, and the length L2 of the second radiator 220 may satisfy: (L1+L2) / 16≤L≤(L1+L2) / 5.

[0117] In some implementations, the antenna 200 may generate a first resonance and a second resonance, and a resonance frequency of the first resonance is lower than a resonance frequency of the second resonance.

[0118] In some implementations, the first resonance and the second resonance are close to each other to jointly form one resonance, to expand an operating bandwidth of the antenna 200.

[0119] It should be understood that, that the first resonance and the second resonance jointly form one resonance may be understood as that, in an S parameter diagram, an S curve between a resonance point of the first resonance and a resonance point of the second resonance is less than or equal to a threshold (for example, -4 dB).

[0120] In some implementations, a resonance frequency band of the resonance jointly formed by the first resonance and the second resonance may include a first frequency band. An operating frequency band of the antenna 200 includes the first frequency band.

[0121] In some implementations, the first frequency band may include at least a part of frequency bands in a middle band (middle band, MB) (1710 MHz to 2170 MHz) in a long term evolution (long term evolution, LTE) technology and at least a part of frequency bands in a high band (high band, HB) (2300 MHz to 2690 MHz), for example, B1 (1920 MHz to 1980 MHz), B3 (1710 MHz to 1785 MHz), and B7 (2500 MHz to 2570 MHz) in LTE.

[0122] It should be understood that the first frequency band may also include another frequency band, for example, N77, N78, or N79 in 5G. This is not limited in this embodiment of this application. A communication frequency band included in the first frequency band may be determined based on actual production or design.

[0123] In some implementations, an electrical length Le of the first metal connection member 230 may be less than or equal to a quarter of a first wavelength and be greater than or equal to one sixteenth of the first wavelength. The first wavelength may be understood as a wavelength corresponding to the second resonance. The wavelength corresponding to the second resonance may be understood as a dielectric wavelength corresponding to a center frequency of a target frequency band corresponding to the second resonance, or a dielectric wavelength corresponding to the resonance point of the second resonance.

[0124] It should be understood that because there is a specific conversion relationship between a dielectric wavelength and a vacuum wavelength, the foregoing dielectric wavelength may be converted by using a vacuum wavelength. For brevity of description, details are not described in this embodiment of this application.

[0125] In some implementations, an electrical length of the first metal connection member 230 may be less than or equal to one tenth of a first wavelength and greater than or equal to one sixteenth of the first wavelength. It should be understood that the length of the first metal connection member 230 may be further reduced based on spatial layout in the electronic device, and radiation performance of the antenna 200 is not greatly affected.

[0126] In this embodiment of this application, the length of the first metal connection member 230 may be understood as the total length of the first metal connection member 230. For example, when the first metal connection member 230 is in a broken line shape, the length of the first metal connection member 230 may be a sum of lengths of all bent parts.

[0127] In some implementations, the first metal connection member 230 may alternatively be of an integrated structure together with the first radiator 210 and the second radiator 220. When the first metal connection member 230 is of an integrated structure together with the first radiator 210 and the second radiator 220, no electronic element of a lumped type (for example, a packaged electronic element) is disposed between the first metal connection member 230 and the first radiator 210 or between the first metal connection member 230 and the second radiator 220, and a distributed electronic element may be disposed in an integrated manner.

[0128] In some implementations, the antenna 200 may further include a feed circuit 240. In some implementations, the first radiator 210 includes a feed point 221, and the feed circuit 240 is coupled to the feed point 221.

[0129] It should be understood that the feed point 221 may alternatively be disposed on the first metal connection member 230. Compared with a case in which the feed point 221 is disposed on the first metal connection member 230, when the feed point 221 is disposed on the first radiator 210, a conductor loss and a dielectric loss of the antenna 200 are smaller when the antenna 200 generates a resonance, so that total efficiency and radiation efficiency of the antenna 200 can be better improved, and the antenna 200 has a wider efficiency bandwidth.

[0130] In some implementations, a distance D1 (a length of the first radiator 210) between the feed point 221 and the first connection point 211 and the length L1 of the first radiator 210 satisfy: L1×10%≤D1≤L1×25%.

[0131] In some implementations, a distance D1 (a length of the first radiator 210) between the feed point 221 and the first connection point 211 is greater than or equal to 0.5 mm.

[0132] It should be understood that the feed point 221 and the first connection point 211 are spaced apart, so that the antenna 200 can have a better radiation characteristic.

[0133] In some implementations, the length L1 of the first radiator 210 and the length L2 of the second radiator 220 satisfy: L2×90%≤L1≤L2×120%. In some implementations, L2×95%≤L1≤L2×110%.

[0134] It should be understood that the length L1 of the first radiator 210, the length L2 of the second radiator 220, positions of the first connection point 211 and the feed point 221 on the first radiator 210, and a position of the second connection point 212 on the second radiator 220 may determine impedance of the antenna 200 at the feed point 221, and may be used to adjust a radiation characteristic (for example, the operating bandwidth, radiation efficiency, and total efficiency) of the antenna 200.

[0135] In addition, a relative position (the distance D1 (the length of the first radiator 210) between the feed point 221 and the first connection point 211) between the first connection point 211 and the feed point 221 may be used to adjust an excitation degree (for example, current or electric field distribution) on the first radiator 210 and the second radiator 220 when the antenna 200 generates a resonance.

[0136] In addition, the length L1 of the first radiator 210 is approximately the same as the length L2 of the second radiator 220, so that symmetry of the antenna 200 is improved, and the antenna 200 can have a better radiation characteristic.

[0137] In some implementations, the antenna 200 may further include a first electronic element 241. The first electronic element 241 is connected between the first end of the first metal connection member 230 and the first connection point 211 in a coupling manner.

[0138] In some implementations, the first electronic element 241 may be inductive, for example, may be an inductor, or an element equivalent to an inductor. In some implementations, an inductance value (an equivalent inductance value) of the first electronic element 241 may be less than or equal to 10 nH.

[0139] In some implementations, the first electronic element 241 may be a 0 Ω resistor.

[0140] In some implementations, the antenna 200 may further include a second electronic element 242. The second electronic element 242 is connected between the second end of the first metal connection member 230 and the second connection point 212 in a coupling manner.

[0141] In some implementations, the second electronic element 242 may be capacitive, for example, may be a capacitor, or an element equivalent to a capacitor. In some implementations, a capacitance value (an equivalent capacitance value) of the second electronic element 242 may be greater than or equal to 1 pF and less than or equal to 3 pF.

[0142] It should be understood that the first electronic element 241 and / or the second electronic element 242 may be configured to determine impedance between the first connection point 211 of the first radiator 210 and the first metal connection member 230 and / or impedance between the second connection point 212 of the second radiator 220 and the first metal connection member 230, to match the first radiator 210 and / or the second radiator 220. The first electronic element 241 and / or the second electronic element 242 may be configured to increase a degree of freedom for adjusting a radiation characteristic of the antenna 200.

[0143] In some implementations, a first end of the first radiator 210 and a first end of the second radiator 220 are opposite to each other and are not in contact with each other.

[0144] In some implementations, the first end of the first radiator 210 is a grounding end, and a second end of the first radiator 210 is an open end. The first end of the second radiator 220 is an open end, and a second end of the second radiator 220 is a grounding end.

[0145] In some implementations, the first end of the first radiator 210 includes a first grounding point 231, and the first radiator 210 is connected to a ground plane at the first grounding point 231 in a coupling manner, as shown in FIG. 2. The second end of the second radiator 220 includes a second grounding point 232, and the second radiator 220 is connected to the ground plane at the second grounding point 232 in a coupling manner.

[0146] As shown in FIG. 3, in some implementations, the first grounding point 231 may be disposed on the first metal connection member 230, and the first end of the first radiator 210 is coupled to the ground plane through the first metal connection member 230.

[0147] In some implementations, a distance (a length of the first radiator 210) between the first connection point 211 and an end portion of the first end of the first radiator 210 is less than or equal to 5 mm. In some implementations, a distance (a length of the first metal connection member 230) between the first connection point 211 and the first grounding point 231 is less than or equal to 5 mm.

[0148] In some implementations, at a first resonance point of the first resonance, a current on the first radiator 210 and a current on the second radiator 220 are reverse. At a second resonance point of the second resonance, the current on the first radiator 210 and the current on the second radiator 220 are co-directional.

[0149] It should be understood that, in this embodiment of this application, a current characteristic (co-directional or reverse) may be understood as a current characteristic presented by a main current (current strength exceeds 50%) in a frequency band. In addition, as a frequency approaches a resonance point, a strength proportion of a current with the characteristic increases.

[0150] As shown in FIG. 4, in some implementations, the first end of the first radiator 210 is a grounding end, and a second end of the first radiator 210 is an open end. The first end of the second radiator 220 is a grounding end, and a second end of the second radiator 220 is an open end.

[0151] In some implementations, the first end of the first radiator 210 includes a first grounding point 231, and the first radiator 210 is connected to a ground plane through the first grounding point 231 in a coupling manner. The first end of the second radiator 220 includes a second grounding point 232, and the second radiator 220 is connected to the ground plane through the second grounding point 232 in a coupling manner.

[0152] In some implementations, the first grounding point 231 and / or the second grounding point 232 may be disposed on the first metal connection member 230, and the first end of the first radiator 210 and / or the first end of the second radiator 220 are / is coupled to the ground plane through the first metal connection member 230.

[0153] In some implementations, a distance between the first connection point 211 and an end portion of the first end of the first radiator 210 (a length of the first radiator 210 between the first connection point 211 and the end portion of the first end of the first radiator 210) is less than or equal to 5 mm. A distance between the second connection point 212 and an end portion of the first end of the second radiator 220 (a length of the second radiator 220 between the second connection point 212 and the end portion of the first end of the second radiator 220) is less than or equal to 5 mm.

[0154] In some implementations, a distance between the first connection point 211 and the first grounding point 231 (a length of the first metal connection member 230 between the first connection point 211 and the first grounding point 231) is less than or equal to 5 mm. A distance between the second connection point 212 and the second grounding point 232 (a length of the first metal connection member 230 between the second connection point 212 and the second grounding point 232) is less than or equal to 5 mm.

[0155] In some implementations, at a first resonance point of the first resonance, a current on the first radiator 210 and a current on the second radiator 220 are reverse. At a second resonance point of the second resonance, the current on the first radiator 210 and the current on the second radiator 220 are co-directional.

[0156] As shown in FIG. 5, in some implementations, the first end of the first radiator 210 is an open end, and a second end of the first radiator 210 is a grounding end. The first end of the second radiator 220 is an open end, and a second end of the second radiator 220 is a grounding end.

[0157] In some implementations, the second end of the first radiator 210 includes a first grounding point 231, and the first radiator 210 is connected to a ground plane at the first grounding point 231 in a coupling manner. The second end of the second radiator 220 includes a second grounding point 232, and the second radiator 220 is connected to the ground plane at the second grounding point 232 in a coupling manner.

[0158] In some implementations, at a first resonance point of the first resonance, a current on the first radiator 210 and a current on the second radiator 220 are co-directional. At a second resonance point of the second resonance, the current on the first radiator 210 is reverse to the current on the second radiator 220.

[0159] As shown in FIG. 6, in some implementations, the electronic device 10 may further include a PCB 17 and a rear cover 21.

[0160] In some implementations, the first radiator 210, the second radiator 220, and the first metal connection member 230 may be disposed between the PCB 17 and the rear cover 21. In some implementations, the first radiator 210, the second radiator 220, and the first metal connection member 230 may be disposed on a surface of the rear cover 21 (for example, a surface that is of the rear cover 21 and that faces the PCB 17).

[0161] In some implementations, the first radiator 210, the second radiator 220, and the first metal connection member 230 may be disposed on a surface of the PCB 17 (for example, a surface that is of the PCB 17 and that faces the rear cover 21).

[0162] In some implementations, a shielding cover 15 may be disposed on the surface of the PCB 17. The shielding cover 15 may be configured to reduce mutual interference between an electronic element disposed in the shielding cover 15 and a radiator (for example, the first radiator 210 and the second radiator 220).

[0163] In some implementations, the electronic device 10 may further include a bracket 250, as shown in FIG. 7. The first radiator 210, the second radiator 220, and the first metal connection member 230 may be disposed on a surface (a surface facing the PCB 17 or a surface facing the rear cover 21) of the bracket 250.

[0164] In some implementations, the antenna 200 may further include an elastic sheet 201, as shown in FIG. 8. The elastic sheet 201 may be configured to be coupled to a feed point and a grounding point that are disposed on the first radiator 210, the second radiator 220, or the first metal connection member 230.

[0165] FIG. 9 is a diagram of another antenna 200 according to an embodiment of this application.

[0166] As shown in FIG. 9, the antenna 200 may further include a third radiator 310. In some implementations, a first radiator 210 is disposed between the third radiator 310 and a second radiator 220.

[0167] It should be understood that a difference between the antenna 200 shown in FIG. 9 and the antenna 200 shown in FIG. 2 to FIG. 5 lies only in the third radiator 310. In the antenna 200 shown in FIG. 2 to FIG. 5, when a feed circuit 240 feeds a radio frequency signal, the first radiator 210 and the second radiator 220 generate a first resonance and a second resonance. However, in the antenna 200 shown in FIG. 9, because the third radiator 310 is disposed, the antenna 200 may additionally generate a third resonance by the third radiator 310 based on the first resonance and the second resonance.

[0168] In some implementations, the third resonance may be understood as a parasitic resonance.

[0169] In some implementations, the first resonance, the second resonance, and the third resonance are close to each other to jointly form one resonance, to expand an operating bandwidth of the antenna 200. In some implementations, a resonance point frequency of the third resonance is higher than a resonance point frequency of the second resonance.

[0170] In some implementations, a resonance frequency band of a resonance jointly formed by the first resonance and the second resonance may include a first frequency band. An operating frequency band of the antenna 200 includes the first frequency band.

[0171] In some implementations, a first end of the third radiator 310 is an open end, a second end of the third radiator 310 is a grounding end, and the first end is an end close to the first radiator 210.

[0172] For brevity of description, parts of the antenna 200 shown in FIG. 9 that are similar to those of the antenna 200 shown in FIG. 2 to FIG. 5 are not described again. For example, the similar parts include: positions of the first radiator 210, the second radiator 220, and the first metal connection member 230; a length proportion relationship between the first radiator 210, the second radiator 220, and the first metal connection member 230; a communication frequency band included in the first frequency band; a position of a feed point 221; a position of a grounding point; and positions of a first connection point 211 and a second connection point 212.

[0173] FIG. 10 and FIG. 11 are diagrams of simulation results of the antenna 200 shown in FIG. 9. FIG. 10 shows a simulation result of an S parameter of the antenna 200 shown in FIG. 9. FIG. 11 shows simulation results of total efficiency and radiation efficiency of the antenna 200 shown in FIG. 10.

[0174] As shown in FIG. 10, the antenna 200 may generate resonances near 1.7 GHz, near 2.1 GHz, and near 2.6 GHz. The resonance generated near 1.7 GHz may correspond to the first resonance in the foregoing embodiment, the resonance generated near 2.1 GHz may correspond to the second resonance in the foregoing embodiment, and the resonance generated near 2.6 GHz may correspond to the third resonance in the foregoing embodiment.

[0175] By using S11<-4 dB as a boundary, a resonance frequency band of the resonance formed by the first resonance, the second resonance, and the third resonance has a wide bandwidth, and may include a middle band (1710 MHz to 2170 MHz) frequency band and a high band (2300 MHz to 2690 MHz) frequency band in LTE.

[0176] As shown in FIG. 11, the antenna 200 has good radiation efficiency and total efficiency in the foregoing resonance frequency band.

[0177] A SAR value of the antenna 200 shown in FIG. 9 in an electronic device may be shown in Table 1. Table 1Resonance frequency1.71 GHz2.3 GHz2.67 GHzFree space radiation efficiency-2.73-1.91-3.63Normalized radiation efficiency-6.5-6.5-6.5SAR valueRear surface (5 mm)1.6021.2871.004Front surface (5 mm)1.0181.0140.807Side surface (5 mm)1.3481.3280.874NormalizedRear surface (5 mm)0.670.450.65SAR valueFront surface (5 mm)0.430.350.52Side surface (5 mm)0.570.460.57

[0178] The back surface (5 mm) may be understood as a region that is 5 mm away from a back surface (a rear cover) of the electronic device. The front surface (5 mm) may be understood as a region that is 5 mm away from a front surface (a display) of the electronic device. The side surface (5 mm) may be understood as a region that is 5 mm away from a side surface (a side frame close to a radiator) of the electronic device.

[0179] As shown in Table 1, based on an antenna layout solution shown in this embodiment of this application, SAR values on the back surface, the front surface, and the side surface of the electronic device are low, and the antenna also has a low SAR characteristic.

[0180] FIG. 12 to FIG. 14 are diagrams of current distribution of the antenna 200 shown in FIG. 9 in the electronic device 10. FIG. 12 is a diagram of current distribution of the antenna 200 shown in FIG. 9 in the electronic device 10 at a resonance point of the first resonance. FIG. 13 is a diagram of current distribution of the antenna 200 shown in FIG. 9 in the electronic device 10 at a resonance point of the second resonance. FIG. 14 is a diagram of current distribution of the antenna 200 shown in FIG. 9 in the electronic device 10 at a resonance point of the third resonance.

[0181] As shown in FIG. 12, at the resonance point (1.71 GHz) of the first resonance, a current on the first radiator 210 and a current on the second radiator 220 are reverse, and the current on the second radiator 220 and a current on the third radiator 310 are co-directional.

[0182] As shown in FIG. 13, at the resonance point (2.16 GHz) of the second resonance, the current on the first radiator 210 and the current on the second radiator 220 are co-directional, and the current on the second radiator 220 and the current on the third radiator 310 are co-directional.

[0183] As shown in FIG. 14, at the resonance point (2.67 GHz) of the third resonance, the current on the first radiator 210 and the current on the second radiator 220 are reverse, and the current on the second radiator 220 and the current on the third radiator 310 are co-directional.

[0184] FIG. 15 is a diagram of still another antenna 200 according to an embodiment of this application.

[0185] As shown in FIG. 15, the antenna 200 may further include a third electronic element 243. The third electronic element 243 is connected between a first radiator 210 and a third radiator 310 in a coupling manner, and may be configured to adjust a coupling amount between the first radiator 210 and the third radiator 310, to adjust a radiation characteristic (for example, a resonance point frequency) of the third resonance.

[0186] It should be understood that a difference between the antenna 200 shown in FIG. 15 and the antenna 200 shown in FIG. 9 lies only in the third electronic element 243.

[0187] In some implementations, a feed point 221 may alternatively be disposed on the third radiator 310.

[0188] It should be understood that a position of the feed point 221 is not limited in this embodiment of this application, and the feed point 221 may be disposed on any stub (for example, a radiator and a metal connection member) of the antenna 200. Details are not described again.

[0189] In some implementations, any one or more of the first radiator 210, a second radiator 220, or the third radiator 310 may be further provided with an insulation slit 311, as shown in FIG. 16. Correspondingly, electronic elements may be connected between radiators on two sides of the insulation slit in a coupling manner.

[0190] It should be understood that, in the antenna 200 shown in FIG. 16, the electronic elements connected to the two sides of the insulation slit in a coupling manner may be configured to adjust a radiation characteristic of the radiator, for example, increase a radiation aperture of the radiator, to further improve a radiation characteristic (for example, radiation efficiency) of the antenna 200.

[0191] In some implementations, the antenna 200 may further include a second metal connection member 320, as shown in FIG. 17. The first radiator 210 includes a third connection point 213, and the third radiator 310 includes a fourth connection point 214. A first end of the second metal connection member 320 is coupled to the third connection point 213, and a second end of the second metal connection member 320 is coupled to the fourth connection point 214.

[0192] In some implementations, the first radiator 210, the second radiator 220, and the third radiator 310 may be configured to generate a first resonance, a second resonance, and the third resonance. The first resonance, the second resonance, and the third resonance may jointly form one resonance, to expand a bandwidth of the antenna 200.

[0193] In some implementations, the antenna 200 may further include a fourth electronic element 244 and / or a fifth electronic element 245. The fourth electronic element 244 is connected between the first end of the second metal connection member 320 and the third connection point 213 in a coupling manner. The fifth electronic element 245 is connected between the second end of the second metal connection member 320 and the fourth connection point 214 in a coupling manner.

[0194] It should be understood that the fourth electronic element 244 and / or the fifth electronic element 245 may be configured to determine impedance between the third connection point 213 of the first radiator 210 and the second metal connection member 320 and / or impedance between the fourth connection point 214 of the third radiator 310 and the second metal connection member 320, to match the first radiator 210 and / or the third radiator 310. The fourth electronic element 244 and / or the fifth electronic element 245 may be configured to increase a degree of freedom for adjusting a radiation characteristic of the antenna 200.

[0195] In some implementations, the feed point 221 may alternatively be disposed on the second metal connection member 320.

[0196] The foregoing descriptions are merely specific implementations of this application, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. An electronic device, comprising: a printed circuit board PCB and a rear cover, wherein the PCB and the rear cover are disposed opposite to each other; and an antenna, wherein the antenna comprises a first radiator, a second radiator, and a first metal connection member, and the first radiator, the second radiator, and the first metal connection member are disposed between the PCB and the rear cover; the first radiator comprises a first connection point, the second radiator comprises a second connection point, a first end of the first metal connection member is coupled to the first connection point, and a second end of the first metal connection member is coupled to the second connection point; and a length L of the first metal connection member, a length L1 of the first radiator, and a length L2 of the second radiator satisfy: (L1+L2) / 16≤L≤(L1+L2) / 2.

2. The electronic device according to claim 1, wherein the electronic device further comprises a ground plane; a first end of the first radiator and a first end of the second radiator are opposite to each other and are not in contact with each other; the first end of the first radiator or the first metal member comprises a first grounding point, the first radiator or the first metal member is coupled to the ground plane at the first grounding point, and a second end of the first radiator is an open end; and the first end of the second radiator is an open end, a second end of the second radiator comprises a second grounding point, and the second radiator is coupled to the ground plane at the second grounding point.

3. The electronic device according to claim 2, wherein the first metal member comprises the first grounding point, and a length of the first metal member between the first connection point and the first grounding point is less than or equal to 5 mm.

4. The electronic device according to claim 1, wherein the electronic device further comprises a ground plane; a first end of the first radiator and a first end of the second radiator are opposite to each other and are not in contact with each other; the first end of the first radiator or the first metal member comprises a first grounding point, the first radiator or the first metal member is coupled to the ground plane at the first grounding point, and a second end of the first radiator is an open end; and the first end of the second radiator or the first metal member comprises a second grounding point, a second end of the second radiator or the second end of the first metal member is an open end, and the second radiator is coupled to the ground plane at the second grounding point.

5. The electronic device according to claim 4, wherein the first metal member comprises the first grounding point, and a length of the first metal member between the first connection point and the first grounding point is less than or equal to 5 mm; and / or the first metal member comprises the second grounding point, and a length of the first metal member between the second connection point and the second grounding point is less than or equal to 5 mm.

6. The electronic device according to any one of claims 2 to 5, wherein the first radiator and the second radiator are configured to generate a first resonance and a second resonance, and a frequency of the first resonance is lower than a frequency of the second resonance; at a first resonance point of the first resonance, a current on the first radiator and a current on the second radiator are reverse; and at a second resonance point of the second resonance, the current on the first radiator and the current on the second radiator are co-directional.

7. The electronic device according to claim 1, wherein the electronic device further comprises a ground plane; a first end of the first radiator and a first end of the second radiator are opposite to each other and are not in contact with each other; the first end of the first radiator is an open end, a second end of the first radiator comprises a first grounding point, and the first radiator is coupled to the ground plane at the first grounding point; and the first end of the second radiator is an open end, a second end of the second radiator comprises a second grounding point, and the second radiator is coupled to the ground plane at the second grounding point.

8. The electronic device according to claim 7, wherein the first radiator and the second radiator are configured to generate a first resonance and a second resonance, and a frequency of the first resonance is lower than a frequency of the second resonance; at a first resonance point of the first resonance, a current on the first radiator and a current on the second radiator are co-directional; and at a second resonance point of the second resonance, the current on the first radiator and the current on the second radiator are reverse.

9. The electronic device according to any one of claims 1 to 8, wherein the electronic device further comprises a feed circuit, the first radiator comprises a feed point, and the feed circuit is coupled to the feed point.

10. The electronic device according to claim 9, wherein a length D1 of the first radiator between the feed point and the first connection point is greater than or equal to 0.5 mm.

11. The electronic device according to any one of claims 1 to 10, wherein the antenna further comprises a first electronic element; and the first electronic element is connected between the first end of the first metal connection member and the first connection point in a coupling manner.

12. The electronic device according to any one of claims 1 to 11, wherein the antenna further comprises a second electronic element; and the second electronic element is connected between the second end of the first metal connection member and the second connection point in a coupling manner.

13. The electronic device according to any one of claims 1 to 12, wherein the length L1 of the first radiator and the length L2 of the second radiator satisfy: L2×90%≤L1≤L2×120%.

14. The electronic device according to any one of claims 1 to 13, wherein the antenna further comprises a third radiator; and the first radiator is disposed between the third radiator and the second radiator, and the third radiator is configured to generate a third resonance.

15. The electronic device according to claim 14, wherein the first radiator and the second radiator are configured to generate a first resonance and a second resonance; and the first resonance, the second resonance, and the third resonance jointly form at least one operating frequency band of the antenna.

16. The electronic device according to any one of claims 1 to 13, wherein a second metal connection member and a third radiator of the antenna; the second radiator comprises a third connection point, and the third radiator comprises a fourth connection point; and a first end of the second metal connection member is coupled to the third connection point, and a second end of the second metal connection member is coupled to the fourth connection point.

17. The electronic device according to claim 16, wherein the first radiator, the second radiator, and the third radiator are configured to generate a first resonance, a second resonance, and a third resonance; and the first resonance, the second resonance, and the third resonance jointly form at least one operating frequency band of the antenna.

18. The electronic device according to claim 16 or 17, wherein the length L1 of the first radiator and a length L3 of the third radiator satisfy: L3×90%≤L1≤L3×120%.

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